PIRSA:14040130

Beyond local causality: causation and correlation after Bell

Pusey, M. (2014). Beyond local causality: causation and correlation after Bell. Perimeter Institute. https://pirsa.org/14040130

Pusey, Matthew. Beyond local causality: causation and correlation after Bell. Perimeter Institute, Apr. 08, 2014, https://pirsa.org/14040130 

          @misc{ pirsa_14040130,
            doi = {},
            url = {https://pirsa.org/14040130},
            author = {Pusey, Matthew},
            keywords = {Quantum Foundations},
            language = {en},
            title = {Beyond local causality: causation and correlation after Bell},
            publisher = {Perimeter Institute},
            year = {2014},
            month = {apr},
            note = {PIRSA:14040130 see, \url{https://pirsa.org}}
          }

Matthew Pusey University of York

Collection Quantum Foundations
Scientific Area
Talk Type Scientific Series

Abstract

There is now a remarkable mathematical theory of causation. But applying this theory to a Bell scenario implies the Bell inequalities, which are violated in experiment. We alleviate this tension by translating the basic definitions of the theory into the framework of generalised probabilistic theories. We find that a surprising number of results carry over: the d-separation criterion for conditional independence (the no-signalling principle on steroids), and even certain quantitative limits on correlations. Finally, we begin a classification of the causal structures, such as the Bell scenarios, that are "interesting" from this perspective. Joint work with Joe Henson and Raymond Lal.